I use Lee Collet neck dies and seaters with Redding body dies for several cartridges. I routinely (and pretty easily) load ammo that shoots 1/2 MOA and as little as 1/4 at 100 in several different factory stock, unmodified guns.

It's hard for me to imagine that "competition" dies would dramatically improve on that performance.

I suspect that ease of adjustment, micrometer marks and what-not, are the best feature of such dies.

I also suspect that they might make more difference in accuracy for a gun that shoots really tiny groups but factory guns essentially "mask" any minute benefits. In other words, a 1/10th MOA improvement would be hard to see in my guns without shooting a whole bunch of rounds. A gun that shoots 1/5 MOA, a 1/10 MOA improvement would be dramatic.

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Still happily answering to the call-sign Peetza.
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The problem, as you so eloquently put it, is choice.
-The Architect
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He is no fool who gives what he can not keep to gain what he can not lose.
-Jim Eliott, paraphrasing Philip Henry.

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